Earlier this year, scientists discovered that a “jet,” created by a very distant supermassive black hole, sent an accumulation of various space matter rocketing directly toward Earth. Scientists haven’t expressed any need for concern about the jet. However, they are intrigued by the sheer brightness of it and the vast distance between it and Earth.
Universe to go through a cosmic Poincare Recurrence? In other words, can the universe repeats itself? Will the same history happen again at some distant future? If the universe is closed and isolated, which indicates that it’s probably qualified for experiencing a Poincare Recurrence in cosmic scale, will the entire history of our universe happen for an infinite number of times? If cosmic Poincare Recurrence can take place, does it mean that the entropy of the entire universe will decrease at some point? Isn’t that the violation of the second law of thermodynamics?
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Sources:
(K. Ropotenko) The Poincar´e recurrence time for the de Sitter space with dynamical chaos.
https://arxiv.org/abs/0712.
(Don N. Page) Information Loss in Black Holes and-or Conscious Beings.
https://arxiv.org/abs/hep-th/9411193
(Julian Barbour) Arrows of Time in Unconfined Systems.
https://arxiv.org/abs/1602.
(Lisa Dyson, Matthew Kleban, Leonard Susskind) Disturbing Implications of a Cosmological Constant.
https://arxiv.org/abs/hep-th/0208013
Leonard Susskind (Stanford University, USA), James Lindesay (Howard University, USA)
There’s a lot we still don’t know about dark matter – that mysterious, invisible mass that could make up as much as 85 percent of everything around us – but a new paper outlines a rather unusual hypothesis about the very creation of the stuff.
Researchers at Uppsala University have formulated a new model for our universe to solve the mystery of dark energy. The study proposes a new way to assemble a dark energy cosmos where our universe rides on an expanding bubble in an extra dimension. In a study, Swedish physicists pointed out the existence of another dimension in the universe we live in. Scientists propose that our universe exists within an expanding bubble in an extra dimension. Studying the cosmos in the last 20 years has shown that the cosmos is constantly expanding. Additionally, the speed of its expansion increases.
The conventional explanation for this goes through a type of energy (dark energy), which permeates everything and “pushes” the universe to expand more and faster. In physical cosmology and astronomy, dark energy is a still-unknown form of energy that is hypothesized to permeate all of space, tending to accelerate the expansion of the cosmos The mysterious dark energy poses more questions than answers, functioning as a cosmic wildcard in some explanations of theoretical physics.
Researchers from the University of Uppsala have proposed a new concept. This includes another dimension and other universes to avoid this problem. In their study, published in the journal Physical Review Letters, physicists from Uppsala University argue that our universe is “mounted” on a bubble that expands in an additional dimension. Our entire universe fits on the edge of the expanding bubble. All matter in our cosmos corresponds to the endpoints of strings that extend into the extra dimension. The researchers also show that expanding bubbles of this kind can be created within the string theory framework.
Do look up.
Scientists have come up with a new method to find dark matter based on a technique that picks up on meteor signatures.
Physicists have purportedly created the first-ever wormhole, a kind of tunnel theorized in 1935 by Albert Einstein and Nathan Rosen that leads from one place to another by passing into an extra dimension of space.
The wormhole emerged like a hologram out of quantum bits of information, or “qubits,” stored in tiny superconducting circuits. By manipulating the qubits, the physicists then sent information through the wormhole, they reported today in the journal Nature.
The team, led by Maria Spiropulu of the California Institute of Technology, implemented the novel “wormhole teleportation protocol” using Google’s quantum computer, a device called Sycamore housed at Google Quantum AI in Santa Barbara, California. With this first-of-its-kind “quantum gravity experiment on a chip,” as Spiropulu described it, she and her team beat a competing group of physicists who aim to do wormhole teleportation with IBM and Quantinuum’s quantum computers.”
The unprecedented experiment explores the possibility that space-time somehow emerges from quantum information, even as the work’s interpretation remains disputed.
This would be great for teleporting objects for shipping across the planet or cosmos eventually. 😀
Scientists have created a “holographic wormhole” inside a quantum computer for the first time.
The pioneering experiment allows researchers to study the ways that theoretical wormholes and quantum physics interact, and could help solve some of the most difficult and perplexing parts of science.
The wormhole is theoretical: researchers did not produce an actual rupture in space and time. But the experimental creation of one inside the quantum computer – which saw a message sent between two simulated blackholes – nonetheless allows scientists to examine how they might work, after almost 100 years of theory.
Axions that decay into photons could account for visible light that exceeds what’s expected to come from all known galaxies.
If you could switch off the Milky Way’s stars and gaze at the sky with a powerful telescope, you’d see the cosmic optical background (COB)—visible-wavelength light emitted by everything outside our Galaxy. Recent studies by the New Horizons spacecraft—which, after its Pluto flyby, has been looking further afield—have returned the most precise measurements of the COB yet, showing it to be brighter than expected by a factor of 2. José Bernal and his colleagues at Johns Hopkins University in Maryland propose that this excess could be caused by decaying dark matter particles called axions [1]. They say that their model could be falsified or supported by future observations.
Comparing COB measurements to predictions provides a tool for testing hypotheses about the structure of the Universe. But measuring the COB is very difficult due to contamination by diffuse light from much nearer sources, especially sunlight scattered by interplanetary dust. Observing from the edge of our Solar System, New Horizons should be unaffected by most of this contamination, making the measured excess brightness a tool for improving our understanding of galaxy evolution.
So-called relativistic jets of energetic particles are stunning, destructive spectacles, and this one was “unprecedented.”
